@article{oai:repo.qst.go.jp:00080358, author = {Ogawara, Ryo and Kusumoto, Tamon and Konishi, Teruaki and Hamano, Tsuyoshi and Kodaira, Satoshi and Ryo, Ogawara and Tamon, Kusumoto and Teruaki, Konishi and Tsuyoshi, Hamano and Satoshi, Kodaira}, journal = {Radiation Measurements}, month = {Sep}, note = {Neutron exposure Accelerator System for Biological Effect Experiments (NASBEE) at National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology (NIRS-QST) achieved thermal neutron flux of a therapeutic intensity of (1.75 ± 0.13) × 10^9 cm^−2 s^−1 by optimizing polyethylene (PE) moderator in the beam port. The dose contamination of gamma rays was 2.37 × 10^−12 Gy cm^2 (the absorbed dose of 14.9 Gy h^−1). The improved thermal neutron field at the NASBEE facility will be useful in the research and development for boron neutron capture therapy (BNCT).}, title = {Polyethylene moderator optimized for increasing thermal neutron flux in the NASBEE accelerator-based neutron field}, volume = {137}, year = {2020} }